如何在不调用new Class（）的情况下初始化Class

Question

我有一个简单的单元测试。

我正在尝试注入服务SearchPageService，但我得到

  

无法读取未定义的属性“ load”

所以我猜customDataService为空，因为我没有在任何地方设置它。如何在服务（moduleApp.SearchPageService）中初始化此服务？

我在karma.conf上配置了文件

files: [
    'angular.js'
    '../app/app.js',
    '../components/angular-mocks/angular-mocks.js',
    'unit/*.js',
    '../app/src/callCenter/page1/searchPageService.js',
    '../app/src/callCenter/page1/searchPageController.js'
],

测试

 describe('Controller: testController', function() {

     beforeEach(function() {
         //module('moduleApp', ['moduleApp.moduleDependencies', 'angular.dependencies', 'third.party.dependencies', 'ipp.dependencies']);
         module('moduleApp.controller');
         module('moduleApp.services');
         module('custom.services');
     });

     var ctrl;
     var $scope;
     var service;
     var customDataService;
     var searchPageService;

     beforeEach(inject(function($controller, $rootScope, $http) {
         $scope = $rootScope.$new();

         console.log('*** IN INJECT!!***: ', service);
         ctrl = $controller(SearchPageController, {
             $scope: $scope,
             'moduleApp.SearchPageService': service,
             CustomDataService: customDataService,
             $http: $http
         });
     }));


     it('should have $scope defined', function() {
         expect($scope).toBeDefined();
     });
 });

控制器

    angular.module('moduleApp.controller').controller('moduleApp.SearchPageController', SearchPageController);
SearchPageController.$inject = ['$log', '$scope', 'moduleApp.SearchPageService', '$http'];


function SearchPageController($log, $scope, searchPageService, $http) { //code }

服务：

 angular.module('moduleApp.services').service('moduleApp.SearchPageService', SearchPageService);
SearchPageService.$inject = ['$log', 'CustomDataService'];

function SearchPageService ($log, customDataService) { 
'use strict';

 var Service = function() {

    this.load = function load(controller, scope) {
        // TODO define configuration
        var loadConfig = [
            //some Configs
            ];
        return customDataService.load(controller, loadConfig);
    };
};

return new Service(); }